package threads;

/*
 * Copyright (c) Ian F. Darwin, https://darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id$
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *        This product includes software developed by Ian F. Darwin.
 * 4. Neither the name of the author nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 * 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

// import - none

/** Simple demo of ThreadGroup usage.
 */
public class ThreadGroupDemo {

	class MyThreadGroup extends ThreadGroup {
		public void uncaughtException(Thread t, Throwable ex) {
			System.err.println("I caught " + ex);
		}
		public MyThreadGroup(String name) {
			super(name);
		}
	}

	public static void main(String[] args) {
		new ThreadGroupDemo().work();
	}

	protected void work() {
		ThreadGroup g = new MyThreadGroup("bulk threads");
		Runnable r = new Runnable() {
			public void run() {
				System.out.println(Thread.currentThread().getName() + " started");
				for (int i=0; i<5; i++) {
					System.out.println(Thread.currentThread().getName() + ": " + i);
					try {
						Thread.sleep(1776);
					} catch (InterruptedException ex) {
						System.out.println("Huh?");
					}
				}
			}
		};

		// Create and start all the Threads
		for (int i = 0; i< 10; i++) {
			new Thread(g, r).start();
		}

		// List them.
		Thread[] list = new Thread[g.activeCount()];
		g.enumerate(list);
		for (int i=0; i<list.length; i++) {
			if (list[i] == null)
				continue;
			Thread t = list[i];
			System.out.println(i + ": " + t);
		}
	}
}
